Skip to main content

AAVSO International Database

Special Notice #22: Bright New Variable in Cassiopeia

October 31, 2006

Daniel W. E. Green, Central Bureau for Astronomical Telegrams, reports (Central Bureau Electronic Telegram 711) that S. Nakano, Sumoto, Japan, reports the discovery of a brightening star in Cassiopeia by Akihiko Tago, Ayabe, Tsuyama, Okayama-ken, Japan. Unfiltered CCD observations by Tago include October 25.538 UT, 10.7; 27.409, 10.5; 30.411, 8.8; 31.469, 7.5. Tago used a 70-mm f/3.2 lens and a Canon EOS 20Da digital camera (limiting magnitude 12).

Special Notice #21: Possible New Object In Tau

October 26, 2006

Dan Green has asked for confirmation of a new object reported to the Central Bureau for Astronomical Telegrams by astronomers at Crni Vrh Observatory of the University of Ljubljana, Slovenia. Here are details:

position (2000): R.A. 03:29:12.26 Dec. +12:50:17.6 (Taurus)

magnitude: ~R magnitude ~14.9 (unfiltered CCD, approx. R magnitude)

date: Oct. 20.0 UT (4 images taken with 60-cm instrument)

Special Notice #1: Exoplanet Transit Campaign for Southern Hemisphere

December 8, 2005

Dr. Greg Laughlin (UCO Lick Observatory/Transitsearch.org) and Dr. David Blank (James Cook University) are conducting a photometric monitoring campaign for exoplanet transits of HD 13445. The windows for possible transit are:

December 11 20:51 - December 12 05:00 (UT)

December 27 14:58 - December 27 23:36 (UT)

HD 1334 is located at RA 02:10:14.4 and Dec. -50:50:0.5 (J2000).

Alert Notice 544: Nova Scorpii 2016 = PNV J17381927-3725077

June 13, 2016

Event: Nova in Scorpius

Discovered by: Hideo Nishimura (Kakegawa, Shizuoka-ken, Japan) (reported by S. Nakano, Sumoto, Japan, via CBET 4285)

Discovery magnitude: 12.4 unfiltered CCD on three 10-s CCD frames, using a 200-mm-f.l. f/3.2 lens with a Canon EOS 5D digital camera

Discovery date: 2016 June 10.629 UT
 
Coordinates (2000.0): R.A. 17 38 19.31  Dec. -37 25 08.7   (from VSX)

Special Notice #417: CH Cygni B and V photometry urgently requested

June 3, 2016: Dr. Margarita Karovska (Harvard-Smithosonian Center for Astrophysics) is urgently requesting B and V photometry of the symbiotic variable CH Cyg from now until at least the end of August. Observations made twice a week are sufficient; time series observations are not needed. Spectroscopy would also be very welcome and appreciated.

Pages

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484